linux-stable/arch/powerpc
Christophe Leroy a2227a2777 powerpc/32: Don't populate page tables for block mapped pages except on the 8xx.
Commit d2f15e0979 ("powerpc/32: always populate page tables for
Abatron BDI.") wrongly sets page tables for any PPC32 for using BDI,
and does't update them after init (remove RX on init section, set
text and rodata read-only)

Only the 8xx requires page tables to be populated for using the BDI.
They also need to be populated in order to see the mappings in
/sys/kernel/debug/kernel_page_tables

On BOOK3S_32, pages that are not mapped by page tables are mapped
by BATs. The BDI knows BATs and they can be viewed in
/sys/kernel/debug/powerpc/block_address_translation

Only set pagetables for RAM and IMMR on the 8xx and properly update
them at the end of init.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/c8610942203e0d93fcb02ad20c57edd3adb4c9d3.1566554029.git.christophe.leroy@c-s.fr
2019-11-18 22:27:52 +11:00
..
boot powerpc/kmcent2: add ranges to the pci bridges 2019-11-17 02:01:02 -06:00
configs powerpc/configs: remove obsolete CONFIG_INET_XFRM_MODE_* and CONFIG_INET6_XFRM_MODE_* 2019-11-13 16:58:06 +11:00
crypto powerpc/crypto: Add cond_resched() in crc-vpmsum self-test 2019-11-13 16:58:02 +11:00
include powerpc/mm: drop #ifdef CONFIG_MMU in is_ioremap_addr() 2019-11-18 22:27:51 +11:00
kernel Merge branch 'next' of https://git.kernel.org/pub/scm/linux/kernel/git/scottwood/linux into next 2019-11-18 22:26:59 +11:00
kvm powerpc/kvm: Fix kvmppc_vcore->in_guest value in kvmhv_switch_to_host 2019-10-09 17:16:59 +11:00
lib powerpc/memcpy: Fix stack corruption for smaller sizes 2019-09-12 09:27:00 +10:00
math-emu
mm powerpc/32: Don't populate page tables for block mapped pages except on the 8xx. 2019-11-18 22:27:52 +11:00
net
oprofile
perf powerpc/perf: remove current_is_64bit() 2019-11-13 16:58:10 +11:00
platforms powerpc/85xx: remove mostly pointless mpc85xx_qe_init() 2019-11-17 01:55:42 -06:00
purgatory
sysdev powerpc/xive: Prevent page fault issues in the machine crash handler 2019-11-13 16:58:10 +11:00
tools powerpc/tools: Don't quote $objdump in scripts 2019-10-30 22:55:12 +11:00
xmon powerpc/watchpoint: Introduce macros for watchpoint length 2019-11-13 16:58:02 +11:00
Kbuild
Kconfig Merge branch 'topic/kaslr-book3e32' into next 2019-11-14 19:23:33 +11:00
Kconfig.debug
Makefile powerpc/configs: Rename foo_basic_defconfig to foo_base.config 2019-10-28 21:54:16 +11:00
Makefile.postlink kbuild: add $(BASH) to run scripts with bash-extension 2019-09-04 22:54:13 +09:00